* {
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}
html,body {
    height: 100%;
    width: 100%;
    background-image: url(../img/backgroud_img.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}
.login_container {
    height: calc(100% - 50px);
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.login_dialog {
    width: 400px;
    height: 400px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 14px;
}
h3 {
    text-align: center;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 25px;
}

.row {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 80px;
}

.row span {
    font-size: 20px;
    width: 100px;
}

.row input {
    height: 40px;
    width: 260px;
    font-size: 20px;
    border-radius: 9px;
    border: none;
}

.row button {
    background-color: green;
    width: 361px;
    height: 40px;
    border-radius: 9px;
    color: white;
    font-size: 20px;
    border: none;
}
#submit:active {
    background-color: #666;
}